How long it takes for a new crown nucleic acid positive to turn negative depends on the individual’s physical condition, the severity of the virus infection, age and other factors. Most patients can turn negative in about 2 weeks. How long it takes for a new crown positive to turn negative can not be generalized, it needs to be based on the severity of the patient’s condition, their own physical condition, age and other factors to look at. In young people with mild symptoms who are in good health, it may only take a few days or a week or so to turn negative. In the case of asymptomatic infection, it usually takes about 7 to 14 days. However, for some severely ill patients with poor autoimmunity, or a history of underlying medical conditions, the virus may be present for a longer period of time, and the treatment time will be significantly longer, and it may take several months for the patient to turn negative. Currently, we have a high vaccination rate, and most patients have mild symptoms after infection, which usually takes about 1~2 weeks to turn negative.